oil pressure
Thread Starter
Racer
Joined: Aug 2008
Posts: 367
Likes: 0
From: Sacramento ca
oil pressure
I was wondering what oil pressure is normal for these cars. After my car has warmed up, at idle you see around 20 psi, it will fluctuate from 20 - 40 depending on thr RPM. Is that low? Does the synthetic oil run at a lower PSI, or can it change because of the viscocity?
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
Mine shows 30~32 psi when hot, and DIC shows oil temp between 200~215 F.
I'm running 5w-30 Mobil 1 full synthetic with NAPA Gold oil filter. I've used about 4 different oil filters over the years with the Mobil 1 and all give the same oil pressure readings.
Do a search for this ... there are TONS of threads about "normal oil pressure".
I'm running 5w-30 Mobil 1 full synthetic with NAPA Gold oil filter. I've used about 4 different oil filters over the years with the Mobil 1 and all give the same oil pressure readings.
Do a search for this ... there are TONS of threads about "normal oil pressure".
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Minimum oil pressure needed to run is 6 psi, however, if your's ever got that low, then its time for a rebuild. An engine with a lot of miles will run down near 20 when idling and hot.
Drifting
Joined: Sep 2003
Posts: 1,363
Likes: 7
From: 1994 LT1 Coupe 6-speed with FX3 & 2000 LS1 Vert 6-Speed with F45 Hunterdon County, NJ
I was wondering what oil pressure is normal for these cars. After my car has warmed up, at idle you see around 20 psi, it will fluctuate from 20 - 40 depending on thr RPM. Is that low? Does the synthetic oil run at a lower PSI, or can it change because of the viscocity?
The typical start-up idle RPM cold pressure is 50-60, and after warm-up, at idle 30ish and at highway speeds, 40-60.
What brand/grade synthetic is in your car? What brand/model oil filter?
If your running a thinner grade (e.g. 0-30), it might reduce your pressure.
ALso, a clogged or cheap (e.g. fram orange) oil filter might cause reduced oil pressure because the bypass valve is open (bad as the oil is not being filtered).
Also, some members report problems with the oil pressure gauge, however, most report high pressure, not low.
Last edited by theadmiral94; Oct 14, 2008 at 11:21 PM.
Instructor
Joined: Feb 2007
Posts: 115
Likes: 9
From: Tampa FL
10 PSI per 1000 RPM?
Not to hijack the thread but has anyone ever seen oil in a C5 that achieves 10 PSI for every 1000 RPM? I've read through the entire article linked below, that first tipped me off to this "gold standard", but have never seen these results in practice.
The gold standard is that all engines should have a pressure of 10 PSI for every 1,000 RPM of operation, not more, not less. After all, you do need some pressure to move that oil along, but only enough pressure, not more.
BTW, Another interesting read on oil is http://www.bobistheoilguy.com/
The gold standard is that all engines should have a pressure of 10 PSI for every 1,000 RPM of operation, not more, not less. After all, you do need some pressure to move that oil along, but only enough pressure, not more.
BTW, Another interesting read on oil is http://www.bobistheoilguy.com/
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
Not to hijack the thread but has anyone ever seen oil in a C5 that achieves 10 PSI for every 1000 RPM? I've read through the entire article linked below, that first tipped me off to this "gold standard", but have never seen these results in practice.
The gold standard is that all engines should have a pressure of 10 PSI for every 1,000 RPM of operation, not more, not less. After all, you do need some pressure to move that oil along, but only enough pressure, not more.
BTW, Another interesting read on oil is http://www.bobistheoilguy.com/
The gold standard is that all engines should have a pressure of 10 PSI for every 1,000 RPM of operation, not more, not less. After all, you do need some pressure to move that oil along, but only enough pressure, not more.
BTW, Another interesting read on oil is http://www.bobistheoilguy.com/
"The gold standard is that all engines should have a pressure of 10 PSI for every 1,000 RPM of operation, not more, not less."
I could maybe believe that an engine needs AT LEASE 10 psi per 1000 rpm to survive ... but the "not less" part doesn't make sense.
Last edited by ZeeOSix; Oct 15, 2008 at 06:29 PM.
